Radar detector/security device for automobiles
US4791420A · kind A · utility
27Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1987 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Dec 29, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radar detector/security device for cars in which the antenna structure of a radar wave detection circuit that drives a warning means when a radar wave is detected is utilized to radiate a local oscillation signal and receive a signal reflected from a dielectric body. The Doppler shift produced by the movement of the dielectric body is detected as a beat component of the local oscillation signal. This beat component causes an incorporated security function to activate a security circuit. The radar detection circuit or the security circuit can be selectively utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.